Pump



P. l.. scoTT i sepan, 1934.I

PUMP

Filed Oct. 20 1930 Afa/Yeni for@ Patented Sept. 11, 1934 PUMP Philip Lane scott, san Mateo, Calif., assignmto Super Diesel Tractor Corporation,- La Porte, Ind., a corporation of New York Application October 20, 1930, Serial No. 489,744

1o claims.

This invention relates to a pump and particularly to a pump adapted to deliver a small quantity of fluid under great pressure and with great speed.

5 It has'for one object to provide a pump in which the mechanical shock due to the movement. of the pump and its driving mechanism is reduced to a Another object is to provide a pump in which sliding surfaces within the pressure chamber ,are eliminated. Another object is to provide a pump in which the walls or a part oi the walls of the pump chamber are elastic. I x

Other objects will appear from time to time inI the speciiication and claims.

The invention is illustrated more or less diatically in the accompanying drawing. wherein-h. v

Figm'e 1 is a cross section through the pump,

. 2o showing the inlet and'outlet valves;

Figure 2 is an elevation ot the pump, showing in part the operating. means.

Like parts are ted by like characters throughout speciiication and drawing.

A is a pump body or housing that is preferably provided in onef ace with a raised land A* which co-operates to Ionma depression or chamber-JA. co-operates to form a depression or pump chamber portion' A. A.a is a cavity iormed in the 3a plnnp body'A and provided adjacent one end with aninwardly extending shoulder or reduced portion A4. An inlet valve housing may be seated in the cavity A3. As is another cavity formed in the body portion A and provided adjacent one endwithashoulderorreducedportionA. An

outlet valve housing may be positioned within the cavity As and may rest against the shoulder orreduoedportionA. Extending throughthe body portionAand communicating with the 4opnmpchamberandwiththeoutsideofthepump isanairvent A". Aisacontrollingvalve therevfor,preierablyprovidedvrithahandleormauipulatingpartAbymeaofwhichitmaybe movedintoandoutotpositiontocontroltheair savent. 'lheaidvent,whileitmaybeplacedm any suitable locatiomis preferably in an extensionA fomedasapartoithevalvebody.

RemovablyaecuredtothevalvebodyAisa retaining portion Bof generally annular shape. soltmaybetastmedtothevalvebody'byscrews 1Bx or byanyother suitable'means.

IyingbetweenthepumpbodyAandtherevtaining member B and compressed against the landAofthennnpbodyisadiscordiaphragm 56C. IttogetberwiththepimpbodyAccmpletes (Cl. 10S-150) the pump chamber A2. This diaphragm may be made of any suitable material and although I have shown it as being laminated and thus made of a. plurality of members, it might be made of a single member. Whatever` its details of construction and form it is essentially an extremely stiff diaphragm.

Supported from and preferably made integral with the retaining member B is a support D. This support is in effect a loop provided with oppositely placed parts which are fastened to the annulus B and provided with a portion joining these two, `so that it thus provides a loop over the valve disc or diaphragm.

E is a compression plate positioned against the 7n diaphragm C. It is provided with one generally ilat face'which lies against the diaphragm and it 'is somewhat rounded or tapered away adjacent its edges as at E1. On its opposite face it carries a boss lilz and a helical race E43. Tapered rollers E4 are mounted to 'run' n the helical race E3.

F is a rocking member provided with a de- A pression F1 which is seated upon the boss E. The rocking member is provided on one i'ace with a helical race F2 and on its opposite 'side so with a dat race F3 within which tapered rollers F4 are positionedadaptecito move. At one edge and extending outwardly from the rocking member F is a pair of ears F, F5. Positioned between the ears is a drive 4rod or shaft l" 35 which may be moved by any suitable mechanism back and forth, as indicated by the arrow in Figure 2. Ft is a boss formed on the member F, opposite the depression F1.

G is a bearing supporting member resting upon the boss F7 ot the member F and provided with a iiat bearing race G1. The member G rests against the support D.

H isan inlet valve housing adapted to be seatedinthecavityAinthepumpbodyA. ltisprovidedwithaborelilwhichhasatone end a valve seat portion H. H3 is a valve positioned within the bore H1 and carrying a head Hadaptedtobeseatedintheseatl. A spring Hs bearing at one end upon the valve and at the other upon the diaphragm C tends to holdth'e valve seated.

I is an outlet valve housing provided with a bore I1 which terminates in a reduced portion P and has a seat I1l adjacent the reduced portion. Iisavalveformedwithapolntl. '111e valve is positioned within the bore I1 and the pointisadaptedtobeseatedintheseatl. I' is a spring tending normally to hold the valve seated. The valve housings may be held in the Il.

position shown by any suitable means,such for example as clamps, or they might be threaded into the valve body.

It will be realized that while I have herewith shown and described a practical operative device, nevertheless many changes might be made in the size, shape, number and disposition 4of parts without departing from the spirit of my invention and I wish, therefore, that my showing be taken as in a sense diagrammatic. Particularly the form of the housing and the means for compressing or moving the diaphragm might be widely changed, as might also particular structural details of the several other parts of the device.

The use and operation of the inventionl arel as follows:

With the parts assembled as shown, it is assumed that the diaphragm or vdisc C is lying in a natural or flat position and that uid is within the pump chamber. VA heavy and preferably sudden pressure is exerted upon the diaphragm to force it inward by movement of the shaft or rod F6, which movement causes the rocking member F to move and the compression member or washer E is forced against the diaphragm as a result of the motion of the rocking member which turns through a portion of a revolution and causes the rollers which engage it to ride upon the helical race formed on the back of the member E and on the face of the rocking member F. The side of the rocking member away from the diaphragm has a flat face which serves merely as a thrust bearing, the other face of which is formed by the member G. This movement of the rocking member F is imparted to the diaphragm C, as explained, and forces it inwardly, thus reducing the volume of the pump chamber, creating pressure within it and forcing open the outlet valve and discharging uid from the pump.

After the discharge stroke the rocking member is moved in the reverse direction and the member E is permitted to fall back from the diaphragm as a result of the reverse movement given the rocking member with its helical race. 'I'he diaphragm may then spring or move outwardly again, thus increasing the volume ofthe pump chamber, permitting or causing the outlet valve to close, oreatinga suction which opens the inlet valve and draws a fuel charge into the pump chamber. Thus a suction stroke is completed and the pump cycle consists of the alternate compression and 'expansion or inward and outward movement of the diaphragm in response to the wedging action which is communicated to it by the movement of the rocking member F.

The yielding member or members of the pump chamber of this invention is subject to strains A well within its elastic limit. The pumpv cham- A rocking member F with relation to the corn- I claim:

1. In combination in a pump, a housing portion defining a pump chamber, and a member fixed to said housing, and means for flexing said member to alter the volume of the pump chamber, the flexing means including a wedge .member adapted to exert pressure upon said member.

2. In combination in a pump, a housing portion defining a pump chamber, and a member fixed to said housing and means for flexing said member to alter the volume of the pump chamber, said member adapted of itself to return to its original position when free to do so, the :dexing means including a wedge member adapted to exertpressure upon said member.

3. In combination in a pump, a housing por-v tion defining a pump chamber, and an approximately rigid member fixed to said* housing, and means for flexing said approximately rigid member to alter the volume of the pump chamber, said approximately rigid member adapted of itself to return to its original position when free to do so, the flexing means including a wedge member adapted to exert pressure upon said approximately rigid member.

4. In combination in a pump, a housing portion defining a pump chamber, and a member fixed to said housing, and means for exing said member to alter the volume of the pump chamber, the flexing means including a rotary wedge member adapted to exert pressure upon said member.

5. In combination in a pump, a housing portion defining a pump chamber, and an approximately rigid member flxed to said housing, and means for flexing said approximately rigid member to alter the volume of the pump chamber, said approximately rigid member adapted of itself to return to its original position when free to do so, the flexing means including a rotary l wedge member adapted to exert pressure upon said approximately rigid member.

6. In combination in a pump, a rigid housing portion partially defining a pump chamber, and an approximately rigid member fixed to said housing and partially defining the pump chamber, and means for flexing said approximately rigid member to alter' the volume of the pump) chamber,v said approximately rigid member adapted of-itself to return to its original position when free to do so, the flexing means including a rotary wedge member adapted to exert pressure upon said approximately rigid member.

7. In combination in a pump, a housing por-130 tion defining a pump chamber, and a member fixed to said housing, and means fornexing said member to alter the volume of the pump chamber, said member adapted of itself to return to its original position when free to do so, the exing means including a wedge member adapted to exert pressure upon the approximately Arigid member, said wedge member having one generally helical bearing race.

8. In combination in 'a pump, a housing por- 140 tion defining a pump chamber, and a member A fixed to said housing, and means for flexing said member to alter the volume of the pump chamber, said member adapted of itself to return to its original position when free to dovso, thefiex- 146 ing means including a wedge member adapted to exert pressure upon the approximately rigid member, there being`roller bearings in contact with said wedge member, said wedge member having one generally helical bearingrace. l5() 9. In combination in a pump, a housing portion defining a pump chamber, and a member xed to said housing, and means for exing said member to alter the volume of the pump chamber, said member adapted of itself to return to its original position when free to do so, the flexing,r means including a rotary wedge member adapted to exert pressure upon the approximate- 1y rigid member, said wedge member having one generally helical bearing race.

10. In combination in a. pump, a housing pormember, there being roller bearings in contact with said wedge member, said wedge member having one generally helical bearing race.

. PHILIP LANE' SCOTT. 

